PROVO, Utah — Prosecutors in the ongoing double murder trial of Kent Cody Barlow have moved to admit evidence of his past criminal behavior, including a previous high-speed police chase and methamphetamine use, to challenge his defense claims of impaired judgment due to drugs. The prosecution argues that Barlow’s assertion that methamphetamine influenced his actions in the fatal crash that killed two children is part of a broader pattern of behavior, not a valid excuse. The prosecution’s request to introduce this evidence was made during a hearing in Utah’s Fourth District Court, where Barlow is on trial for the deaths…